| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust pipe direct fuel injection system capable of making the pressure of fuel supplied to a fuel injection valve always constant and necessary pressure even if fuel pressure is instantaneously changed by fluctuation in engine speed, in the exhaust pipe fuel direct injection of an internal combustion engine. <P>SOLUTION: A fuel pressure fluctuation suppression mechanism 20 is arranged at a fuel supply pipe 12 to the fuel injection valve 11 in series. In the fuel pressure fluctuation suppression mechanism 20, a first accumulator 22 is arranged at a fuel inlet 21 side and a second accumulator 24 is arranged at a fuel outlet 23 side, first check valves 25, 25A are arranged between a fuel inlet 21 and the first accumulator 22, and a second check valve 26 is arranged between the first accumulator 22 and the second accumulator 24 to allow a flow from the fuel inlet 21 side to the fuel outlet 23 side. The first accumulator 22 is provided with a pressure-regulating valve 27 for discharging fuel f when internal combustion pressure becomes higher than preset pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT |
